Hydraulic lifting mechanism.



K. H. w. L. sEcK.

HYDRAULIC LIFTING MEGHANISM. APPIOATION FILED JAN. 28, 1913. 1,093,151., Patented Apr.14,1914.

.Z SHEETS-SHEET 1.

W z E K. H. W. L. sBcK.

HYDRAULIC LIFTING MBGHNISM. APPLIOATION FILED JAN. 2s, 1913. l

YLGQSJM. y PatenteaApr.14,1914.

y2 SHEETS-SHEET 2.

draulic. liftin KARL HEINRICH WILHELM LUDWIG' SIEGE, 0F MANNIIFIIEfIll/lf,` GERMANY, ASSIGNOR TO THE FIBMLOF HEINRICH IANZ, OF MANNHEIM,\GEBMANY.

V2 f HYDRAULIC LIFTING MECHANISM.

speeineation of'retters ratent. Patemd Api, M, 1914,

Application mea January as, 191s. serianm. 744,648.

To au whom t may @andern L Be it known that L'KARL HEINRICH VlIL- HELM LUDWIG SECK, subject of the German Emperor, residing atv 22 Augusta Anlage,

Mannheim, in-the lGerman Empire, have invented certain new. and useful Improvements in Hydraulic Lifting Mechanism, of which the following is a specification.` This invention relates to an improved hymechanism particularly intended. for li ting and loweringthe hoes or bodiment of the invention `by way of eX- ample.. i

' receptacle, and'Figs. 3, 4 an -other cultivating implements of .motorl driven cultivating machines.

According to the V present invention the hoes orcultivators 'are suspended from a piston working within acylinder and adapted to be raised or-lowered therein by the passage of a Huid to ,or fromfthe cylinder,

'the fluid being supplield thereto from a suitable receptacle by `means 'of .a fluid pump whose receiving end is'always in communication with the timid-receptacle, valve means being provided for enabling the pump either to supply the fluid to theo linder or to idly `circulate the fluid to and' romthe uid receptacle and for enabling the fluid in the cylinder` to be returned to the fluid recep` tacle -on the lowering of the cultivators.

In order that the invention may be more clearly understood, reference is made to the accompanying drawings4 Vshowing one em- Figure l 1s a detail verticalsectional elevationl showing the pump, fluid' receptacle, cylinder, andiston, the parts being shown in the same p ane for the sake of clearness: Fig. 2 is a plan v iew of the lpump and Huid 5-a're horizontal sectional` views on the line Al-B of Fig.

- 1,-sl1owing thepositionof the valves at different stages ofthe raising and lowerin operation. Fig. -isa detall side view o 4the upper part of the iuid receptacle and piston cylinder, and Fig. 7 is a plan view thereof.

The cultivators are suspended from a piston F working within a cylinder E., the piston F supporting at its lupper end a' balanced' lever1 -ffrom which the cultivators are suspended by meansd of connecting rods f2 and a transverse bar. `The piston F is adapted to be raised within the cylinder E by supplying. a; fluid, referably oll, thereto from a pump G pre erably vof the rotary k tacle geared-vane` type andadapted to he driven from any suitable source of power.

The `ump G takes oil from an oil recepwhlch isV always in `communication with the receiving end of the puinp G and which has a valve vcasir'ig It therein bridged across the interior of the receptacle H and provided with a transverse passage lz, connecting the. pressure space of the pump G with a pipe y'leading to theicylinder E. i Rotatably mounted in the valve casing L are two valves or cocks K and L, the cock K controlling the passage twhile the cock L controls a branch passage k2 connecting the passage -L with the interior of the oil receptacle as may be readily seen in Figs. 3 to 5. The cocks K' and L ,are adapted to be rotated by means of levers kfand'l respectively 4mounted on t-he top of the oil receptacle lIl[ and connected to the valves by means of valve rods `7a2 andl Z2 respectively. The pump G is adapted to supply oil from the receptacle H tothe cylinder' E or to idly circulate the oil to or from the receptacle H according to the osition of the cocks K and L respectively. en the cultivators are in their lowerniost conditionthe cocks K. and L are in the vposition illustrated in Fig; 3, in-

which both cocks are open, the 'pump G taking oil from the receptacle H and returning it thereto through the passages h and h2.

If 1t 1s desired to'raise the vcultivators, the

cock L is closed a's illustrated in' Fig. 4, so

that the pump G will now no longer return the oil to the rece tacle H and in conse-V quence thereof the oil will be forced through the open-cock/Kto the cylinder E and raise' the piston F therein together with the balanced lever f' and connecting rods f2, thus raising thecultivators. When theculti vators have been raised to the desired height,

the cock K may be closed and the .cock L .'opened, as illustrated in Fig. 5, whereupon theoilI will be prevented from, returning from the cylinder E while the pumpl G will again idly circulate oil to` and from the receptacle H. Lf the 'cultivators are to be lowered the cock K is again opened as illus-- trated in Fig. 3 whereupon the oil in the. cylinder E will vbe Aforced back automatlcally under the weight of the piston F and. the parts connected thereto, thus returnlng.

the oil to the receptacle H through the passages h and k2. ,e

' agconnecting rod'Mby a -pin 'It will thusbe seen that lay-proper conf 'trol of the cocks K and-"L th cultivators may be raised toan desired position. In order that the cu tivators may not' be raised above a pre-determined height mechanisniis provided for automatically-controlling the cocks K and L, this mechanism be# ling more clearly illustrated in Figsf and 7 For this purpose the valve operating levers lo' and Z have extensions lc and] 'respectively on the other side of their axes of rotation, the extension lf; being connected to 7c extending downwardly into the path of the extension L so as to bear threagainst. Accordingly,

if the lever k' is turned into the position y illustrated in dotted lines in Fig. 7, the

lever-Z will be turned therewith,as likewise the arni o of a three-armed lever O pivoted at m, to the'cylinder E, the ainf o bein 0r heldj against the pin n by a spring o guided on a pin c on the cylinder E and bearing against .the second arm o2 of the three-armed lever O whose third arm .03 abuts against a pin` P passing-through a boss eon a flange e2, on the cylinderl E, said pin P being screwedv or otherwise adjustable' in a nut or sleeve p ,normally resting upon the flange e2. The pin P may'beheld fast in the nut or' sleeveA p bya pinching screw v The cover 'g' from w i h depends the piston F has a projecting lug'g to which is secured one endof a vertical rod R supporting at its lower end a disk 1*. Threaded on the rod R is a spring S 'supported by; the disk rf andadaptead, when raised, to bear against a loose sleeve T ion' the rod vR and r`connected at its lower end t to the lower arm of '.When oil is supplied to the cylinder E -fromy the puipp G the cocks K and L are in the position sti-ated in Fig. '4f/and the levers k and Z inthe position illustratedin Fig. 7 in full lines. .As the piston F is (v .raised Jthe rod Rmoves upwardly therewith causing the spring S to be' compressed against the lewer end of theV sleeve T 'which is prevented from movement by the engage-V ment 'of the-ar o with the pin n. of the etlbowlverN. As the rodV -R continues its upwamovement, the-disk r thereon strikes the* pin P, raising the latter and vreleasing f -the Vpin n from .the arm 0,. whereupon the Y nelb'ow lever N is suddenly rotated by the action. of thespring'S on the sleeve Tf, thus causing the elbow lever N togpull the rod M sharply, thusswiiiging the levers k and-Z- into the position illustrated in dotted lines I Y l.

in Fig. 7 orres ending to the position of the cocks K an Lin Fig. 5,thus cutting off the su ply of oil to the cylinder 'E and causin tne oil to be idly circulated to or from t e receptacle H..

moment at whichthe valves are antoniati cally operated and consequently the height of the cultivators maybe varied by correspondingadjustment of the pinP; v In order to prevent the entr into the oil receptacle Ha tilt-erin device J m`ay be arranged on the open en of said receptacle H.

I claim :k-

of dust It will be readily understod l that the *7o f.- ,80 l. Hydraulic lifting mechanism comprising a cylinder,- a piston working therein and adapted .to be connected -to.an"element to be lifted, a rotary geared-vane pump nconnectedvto said cylinder; a fluid receptacle between said'pump and' cylinder and open always t'o the receiving-.end of said pump, and valves in saidvreceptacle for enabling said pump either to supply Huid from said receptacle to said cylinder orito' circulate itv idly to and from said receptacle, while the fluid in said cylinder may return lto said receptacle without passing through lsaid. pump.

lifted, a rotary geared-,vane pump, a tluid 2. lHydraulic lifting mechanism compris-V receptacle connected to and open always to the suction side of saidpump, a valve casing bridged across the interior of said receptacle` a pressure fluid passage passing through said v a ve casing from the pressure sideof said pump to said cylinder, a branch lfluid passage in said valve casingle'adingrom said. pressure fluid passage and opemng into said receptacle, rotatable valves in said valve cas-r 3. Hydraulic lifting mechanism compristhe suction side of said pump, a valve casingin said receptacle, a lpressure liuidr passage passingftlirough lsaid valve .casing from the "pressreside of said pump `to said cylinder,

a branch fluid passage in'l said valve casing leadingfrom said pressure .iiuid passage and ing for controllin sai-d fluid passages, and t v.means for manipu ating said valves. l

i ing a cylinder, apiston working therein.. and

openingint said receptacle, .valves 'in said l valve casing forl controllingl .said fluid pas-V sages, and mechanism for automatically closing the-valve 'saidjpr's'sure fluid passage` andfor automatically'opening the .valve in said branchfluid passage on la pre-'determined movement of said piston.

Aizis 4. Hydraulic lifting mechanism compristo be connected tofan element to be indga clinder, a piston working therein and a apte iso lifted a Huid receptacle, a pump, a fluid passage from the pressure side of said pump to said cylinder, a branch 4fludfpassage lead' ing therefrom into said receptacle, a .con-

-nect'ion from said receptacle to the suction therefrom into said receptac e, a connection' from said receptacle -to the suction side of said pump, valves in said fluid passages, operating levers for said valves, an elbow lever pivoted on said cylinder, one arm of which is connected to said operating levers, means .for temporarily locklng said elbow lever, a`

spring adapted to bear againstthe other arm of said elbowlever on the outward movement of said piston, and mechanism for re'4 leasing said locking means on a pre-detervpump to said-cylinder,` a branch fluid pas-f mined outward movement of said piston to enable said spring to actuate said elbow lever. 4 i 6. Hydraulic lifting mechanism coinprising a cylinder, a piston working therein and adapted to be connected to an element to be lifted, a fluid receptacle, a pump, a fluid passage from the pressure side of said sagel leadingl `therefrom into said receptacle, `a connection from said receptacle to the suction side of said pump, valves in Vsaid fluid passages, operating levers' for said va1ves',.an elbow lever pivoted on said cylinder, onefarm of which is connected tolsaid operating levers, a pin on the other arm of said elbow lever, a4 spring-controlled locking member engaging said pin, an adjustable pin actuating said locking member to disengage 'it' from the pin on said elbow lever,

a rod connected to said piston, an abutment..

thereon adapted to engage said pin on a predetermined outward movement of said piston, and a spring on said rod adapted to be compressed against the pin-carrying arm of said elbow lever on -the outward movement of said piston. t

7. Hydraulic lifting mechanism comprising a cylinder, a piston Working therein and adapted to be connected to an element to rbe lifted, a fluid receptacle,a pump, a fluid passage from the pressure side of said pumpto said,cylindera branch fluid passage leading therefrominto said receptacle, a connection from'said receptacleto the suc.-

tion side of said pump, valves in said fluid passages, operating levers for said valves, an elbowr lever pivoted on said cylinder, a connecting rodfrom one arm vof said elbow lever to one of said operating levers, an abutment on the last mentioned operating lever abutting against the other operating lever, means for temporarily locking said elbow lever, `a spring adapted to Abear against the other arm of said elbow lever on the outward movement ofsaid piston, and mechanism for releasing said locking means on a predetermined movement of said piston.

In .testimony whereof I have affixed my signature in Ipresence oftwo witnesses.

-WILLY SECK.

Witnesses: A,

. IH. MEYER, JOSEPH HEIFFER. 

